rust_browser/tests/goldens/expected/212-margin-collapse-min-height.dl.txt at fix/es-modules-fifth-review-3-4 - rust_browser - Code @ MoldyBits.net

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Zachary D. Rowitsch 0863153acd Implement parent-child margin collapsing (CSS 2.1 §8.3.1)

Add parent-first-child top and parent-last-child bottom margin collapsing
using a two-level approach (Level A shifts child inside parent, Level B
adjusts grandparent for effective collapsed margin). Fix pre-existing bug
in shift_subtree_x that incorrectly skipped absolute/fixed children.
Extract shared MARGIN_EPSILON constant, add 9 unit tests and 4 golden
tests (209-212), promote 31 WPT tests to pass. Includes code review
fixes: pub(crate) visibility for is_root_element, known-limitation docs,
and inline-content shift test coverage.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-13 18:41:50 -04:00

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   SolidRect rect=(0, 30, 800, 10) color=#90ee90
   SolidRect rect=(0, 65, 800, 10) color=#ffffe0